import type { SourceControlProviderInfo } from "@t3tools/contracts";

export interface ChangeRequestPresentation {
  readonly icon: "github" | "gitlab" | "azure-devops" | "change-request";
  readonly providerName: string;
  readonly shortName: string;
  readonly longName: string;
  readonly pluralLongName: string;
  readonly providerLongName: string;
  readonly checkoutCommandExample: string;
  readonly urlExample: string;
}

const GITHUB_CHANGE_REQUEST_PRESENTATION: ChangeRequestPresentation = {
  icon: "github",
  providerName: "GitHub",
  shortName: "PR",
  longName: "pull request",
  pluralLongName: "pull requests",
  providerLongName: "GitHub pull request",
  checkoutCommandExample: "gh pr checkout 123",
  urlExample: "https://github.com/owner/repo/pull/42",
};

const GITLAB_CHANGE_REQUEST_PRESENTATION: ChangeRequestPresentation = {
  icon: "gitlab",
  providerName: "GitLab",
  shortName: "MR",
  longName: "merge request",
  pluralLongName: "merge requests",
  providerLongName: "GitLab merge request",
  checkoutCommandExample: "glab mr checkout 123",
  urlExample: "https://gitlab.com/group/project/-/merge_requests/42",
};

const AZURE_DEVOPS_CHANGE_REQUEST_PRESENTATION: ChangeRequestPresentation = {
  icon: "azure-devops",
  providerName: "Azure DevOps",
  shortName: "PR",
  longName: "pull request",
  pluralLongName: "pull requests",
  providerLongName: "Azure DevOps pull request",
  checkoutCommandExample: "az repos pr checkout --id 123",
  urlExample: "https://dev.azure.com/org/project/_git/repo/pullrequest/42",
};

const GENERIC_CHANGE_REQUEST_PRESENTATION: ChangeRequestPresentation = {
  icon: "change-request",
  providerName: "source control",
  shortName: "change request",
  longName: "change request",
  pluralLongName: "change requests",
  providerLongName: "change request",
  checkoutCommandExample: "123",
  urlExample: "#42",
};

export function resolveChangeRequestPresentation(
  provider: SourceControlProviderInfo | null | undefined,
): ChangeRequestPresentation {
  switch (provider?.kind) {
    case "github":
    case undefined:
      return GITHUB_CHANGE_REQUEST_PRESENTATION;
    case "gitlab":
      return GITLAB_CHANGE_REQUEST_PRESENTATION;
    case "azure-devops":
      return AZURE_DEVOPS_CHANGE_REQUEST_PRESENTATION;
    case "unknown":
      return GENERIC_CHANGE_REQUEST_PRESENTATION;
  }
}

export function formatChangeRequestAction(
  verb: "View" | "Create",
  presentation: ChangeRequestPresentation,
): string {
  return `${verb} ${presentation.shortName}`;
}

export function formatCreateChangeRequestPhrase(presentation: ChangeRequestPresentation): string {
  return `create ${presentation.shortName}`;
}